Consider the following statement is respect of motion economy related to the use of human body?
1. Smooth continuous motions of the hand are preferable to zig – zag motions
2. Rhythm is essential to the smooth and automatic performance of an operation
3. The hands should be relieved of all work that can be done more advantageously by a jig fixture or foot operated device
Which of the statements given above are correct?
(a) 1, 2and 3 (b) 1 and 2 (c) 2 and 3 (d) 1 and 3